Thread cop



Des. 5, 1933. R. N. coRTHELL THREAD COP Filed oct. 12, 1931 v Patented Dec. 1.933lv I l UNITED srrl'rrzsv riviaNrl OFFICE THREAD 00P Robert N. Corthell, Auburn, Maine Application october 12 1931. serial No. 568,322 4 claims. (or 242-159,)

This invention relates particularly vto a thread so that a limited end portion of the core procop comprising a cop tube or core on which the jects from the base end of the body. thread is universally or cross Wound to form The cushion 14surrounds the .projecting base a thread body, which may be either conical and end of the core and projects outward therefrom l tapering inward from its base end to its outer to cover the base end of the body and project 00 end, or cylindrical and rof uniform diameter outward from the periphery thereof, said cushion from end to end. being preferably a continuous ring of felt or When inV use the cop is supported in a ver-tithick compressible cloth. cal position and conned against horizontal dis- The improved cop is characterized by the in placement. When the thread is drawn off from clamping meansnext described7 quickly engage- 05 the body, convolutions of the threadl sometimes able withthe projecting portion of either a tay fall to the base end of thebody and are drawn pering or a cylindrical core, and adapted to thereunder and entangled so that the threadis closely clamp a cushion of any desired thickness broken by the pullexerted thereon by a sewing againsty the base end 0f the JUnread* body.

15 machine. To prevent this it is customary to Iprovidea clamping member of approximately 70 conne against the base end of the thread body annular form made of resilient sheet'aluminum a cushion of yielding-material which acts to or other material which is much harder than the support any dropped lcoils of thread which may material of the core, and is sufficiently thin to collect at the base of the thread body and reenable an edge portion of the member to grip tain them on the `outer periphery of the body e the Del'iphelyf the COIe, the 'latter being made 75 so that:` they cannot become entangled. of compressible material such as'wood pulp.

The object of the invention is to provide a cop The clamping member may be variously con- Which may be either tapered or cylindrical and structed as. hereinafter described, and in any includes improved clamping means contracted CaSe iS adapted t0 preSS a CilShiOn 14 Of any de- V25, upon, and in gripping engagement with a prosired thickness closely' against the base end of 870 jecting portionrof the cop, in such manner as to the. thread body, the Clamping member having, closely connne the cushion against the baseend in each case,V a thin arcuate edge preferably a of the thread body. thirty-second of an inch thick, conforming to Of the accompanying drawing forming a part and in grasping engagement With the projecting of thisy specii'lcation, core portion, an arcuate outer edge conforming 35 Figure l is a side View partly in section of a t0 and Supporting the Outer margin 0f the cop having a cushion clamping member con- Cushion, and an Opening eXtending fIOm IChe instructed in accordance with the invention. ner t0 iShe Outer edge, Said Opening'permiiting a Figure 2 is a perspective view 'ofy the elamptensioning lexpansion of the member for a puring member shown by Figure 1. pose hereinafter stated. 90

Figure 3 is a section on line 3--3 of Figure 1. In the preferred embodiment of the invention Figure 4 shows in perspective the clamping shown by Figures 1 to 6 inclusive, 15v designates member shown in the preceding gures and a the approximately annular clamping member supplemental clamping member associated having relatively wide arcuate sides of sufficient 40 therewith. width to enable the member to adequately sup- 95 Figure 5 is a fragmentary sectional view Simi- `port the cushion 14, a relatively thin arcuate lar to the lower portion of Figure 1, showing the inner edge .17, an arcuate outer edge substantial--y two clamping members shown by Figure 4. ly concentric with the inner edge, and an open- Fgnre 6 shows a clamping member slightly ling `16 extending fromftheV inner tothe outer differing from that shown by Figures 2 and 3. g edge. TheY arcuate inner edge 17 has end Dorf 100 Figure is a fragmentary perspectiveview `tions 17e which are normally spaced apart adisshowing a portion of av cop in an inverted'p'osi-V -anee eSS thanv the diameter 0f the PIOJ'eCiing tion and illustrating avmodication. i core portion, and the above mentioned opening The same reference characters indicate the 16 iS defned'by extensions 19 and 2010i the innery same parts. in all ofthe figures. edge 17. Said extensions arev normally spaced 105 In the drawing, 12 designates the core, 13 apart at their outer ends by a distance slightly the thread body wound thereon, and 14 an an greater than the diameterof the projecting core nular cushion of compressible material such as portion so that the mouth of the opening 16 is felt, contacting with the base end of the body 13. adapted to receive the projecting portion of the The thread body is positioned .on the core core when the memberl is forced ed'ewiseonto 110 said projecting portion, the arrangement .being such that when the portions 17a of the arcuate inner edge encounter the core portion, the member 15 is expanded and tensioned to permit the arcuate edge 17 to embrace the core portion and automatically contract or spring inward into gripping engagement with the periphery thereof. The edge 1'7 may slightly indent the core as indicated at 18.48 (Fig. 3). The clamping member 1'7 is thus iirmly interengaged with the core and caused to confine the cushion against the base of the thread body, whatever the thickness of the cushion may be.

When a tapered core is employed as here shown, the projecting portion is the larger end of the core, and the tapering form of the core assists the contracted inner edge 17 in coniining the clamping member against downward displacement of the core.

One of the extensions 19 and 2O dening the opening 16 may have an outward curvature, and the other an inward curvature. This formation is intended to decrease liability of the working loose of the clamping member from the core.

Figures 4 and 5 show a supplemental clamping member associated with the clamping member 15 to close the gap formed by the mouth ofthe opening 16. The supplemental clamping member 2l may Vbe in all respects like the member 15 excepting that it has a lip 22, which when the two members are assembled as shown by Figure 4, bridges the mouth of the opening 16.

The supplemental member 21 is engaged with the core by an edgewise movement opposite that in which the member l5 is moved to engage it with the core. When the member 2l is not employed, the gap formed by the mouth of the opening 16 may be bridged by a ring of stiff paper placed on the member 15, a portion of said ring extending across the gap.

One of the opening defining extensions of the inner edge 17 may have a sinuous form as indicatedat 23 (Fig. 6), the other extension having an inward curvature as indicated by 24. The

, object of this formation is to preventfliability of the working loose of the clamping member from the core.` u f In the modification shown by Figure 7 the clamping member is a normally fiat-sided ring 25 having a thin core-grasping inner edge 26 and an outer edge 27 formed by the periphery of the ring, and adapted to support the margin of the cushion 14. The ring is provided with a narrow opening 28, so that it has end portions in close proximity to each other, adaptedto be sprung apart to tension the ring and permit its inner edge 26 to embrace the core 12,.and automatically contract or spring inward thereon, to permit the gripping engagement of the inner edge 26 with the periphery of the core 12, so that the member 25 may lbe engaged with the core with suitable firmness.

Althopgh I have shown only a tapered cop, it is obvious that the core and thread body may be cylindrical instead of tapered. The tapered form is preferred.

The clamping means characterizing my invention may be engaged with the cop'12 at a suitable distance from the core base to permit it to clamp a cushion of greater thickness than that shown, against said base.

VI claim:

1. A thread cop comprising a core, a thread body wound thereon, the base end of the core projecting from.the base end of the body, a

ter thereof, and a clamping member of approxi-` mately annular form composed of resilient sheet material and having relatively wide arcuate sides, relatively thin inner and outer arcuate edges, and a lateral opening extending from the inner to the outer arcuate edge, said opening permitting the tensioning of the member by expansion thereof, the inner arcuate edge embracing the projecting end portion of the core, and being automatically contracted or sprung inward thereon by the tension of the member to grip the core and confine the cushion against the 'base end o the body.

2. A thread cop as specified by claim 1, the arcuate inner edge of the clamping member having ends which are normally spaced apart a distance less than the diameter of the projecting core portion, said opening being dened by extensions ofY said inner edge normally spaced apart at their outer ends so that the mouth of the opening is adapted to receive the projecting core portion, the arrangement being such that where the clamping member is forced edgewise Onto said core portion the member; is expanded and tensioned and when the inner arcuate edge embraces the core said edge is automatically contracted or sprung inward on the core by the tension of the clamping member, and grips the core and connes the cushion against the base end of the body.

3. A thread cop comprising a core, a -thread body wound thereon, thebase end of the core projecting fromthe base end of the body, a compressible annular ycushion covering the base end of thebody and projecting from'theV perimeter thereof, aclamping member of approximately annular form composed of resilient sheet material, and having relatively .wide arcuate sides, relatively thin inner and outer arcuate edges, and a lateral opening extending from the inner to the outer arcuate edge, said inner edge having ends which are spaced apart a distance less than the diameterA of the projecting core portion, -said opening being dened by extensions of said inner edge normally spaced apart at their outer ends so that the mouth of the opening is adaptedto receive the projecting core portion, said opening permitting the tensioning of the clamping member by expansion thereof, the inner arcuate edge embracing the projecting core portion and being automatically contracted or sprung inward thereon by the tension of the clamping member to grip the core and conne the cushion againstthe base end of the body, the cop comprising also a supplemental clamping member engaged, like the first mentioned member, with the projecting core portion, and provided with a clamping lip projecting into and closing the gap formed by the opening in said first mentioned member. i

LA thread cop comprisinga tapered core, a tapered thread body wound thereon, the base end of the core projecting from the base end of the body, a compressibleannular cushion covering the base end of the body and` projecting from the perimeter thereof, the projecting portion of the core being the larger end thereof, and a clamping member of vapproximately annular form composed of resilient sheet material and having relatively wide arcuate sides, relatively thin inner and outer arcuate edges, and an opening extending from the inner to the outer arcuate edge, said opening permittingthe base end of the body, the tapered form of the core assisting the contracted'inner edge in con fning the clamping member against downward displacement on the core.

Y ROBERT N. CORTHELL. 

